Pipe joints

• US 4,036,512 A
• Filed: 09/30/1975
• Issued: 07/19/1977
• Est. Priority Date: 10/01/1974
• Status: Expired due to Term

• Current Assignee: Robert Arthur Francis
• Original Assignee: Robert Arthur Francis
• Inventors: Francis, Robert Arthur
• Primary Examiner(s): Arola, Dave W.
• Application Number:
  US05/619,972
• Time in Patent Office: 658 Days
• Field of Search: 285/110, 285/111, 285/112, 285/230, 285/231, 285/401, 285/354, 285/395, 285/369, 285/232, 285/349, 285/359
• US Class Current: 285/111
• CPC Class Codes: F16L 17/035 the sealing rings having two lips parallel to each other
• CPC Class Codes: F16L 37/113 the male part having lugs on its periphery penetrating into the corresponding slots provided in the female part

Abstract

This invention relates to a pipe joint for the butt jointing of pipes in the form of a sleeve to receive the respective pipe ends and provide a resilient seal between the sleeve and the pipe surfaces, said seal having peripheral lips adapted to effect an increase in sealing engagement by fluid pressure in the pipes.

Claims

1. A pipe joint for butt jointing of pipes comprising a sleeve adapted to receive and embrace the respective ends of pipes to be joined, a plurality of spaced apart radially projecting lugs at each end of the sleeve, said lugs having inner inclined wedging faces, and apertured closure for each end of said sleeve, spaced apart channeled flanges on said closures to engage the lugs on the sleeve to provide a bayonet type connection, said flanges being formed with stops to determine full engagement of said flanges with said lugs and being further formed with inner faces which are engaged by the wedging faces of said lugs;

flanges integrally formed with said sleeve adjacent each end thereof and extending radially inwardly to form annular guides for said pipes, said flanges and the radially inner portions of said closures which are longitudinally spaced therefrom forming annular recesses about the pipe ends, resilient generally V-shaped sealing rings mounted in said annular recesses, each of said sealing rings comprising an annular groove defined by generally flat, inwardly directed peripheral lips and being formed with circumferentially spaced and radially arranged reinforcing webs, the inner surface of the outer flange of each closure bearing directly against the outer face of each respective sealing ring to press the sealing ring into said annular recess and effect initial sealing engagement of the peripheral lips with the sleeve and respective pipes, with the fluid pressure in the pipes resulting in continued sealing pressure being exerted on said peripheral lips to respectively sealingly engage the same with the adjacent inner surface of the sleeve and the adjacent outer surface of the respective pipes.